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https://issues.apache.org/jira/browse/CALCITE-2761?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16735539#comment-16735539
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Stamatis Zampetakis commented on CALCITE-2761:
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If I understand correctly your problem is that you can not obtain a plan
(RelNode) that has the NVL operator as is (i.e., RexCall). Isn't this more
related to the SqlToRelConverter rather than the opposite? Moreover, in
SqlToRelConverter you can pass whatever operator table you want so in the end I
don't see where is the problem.
> Add NVL function to SQL standard operator table
> -----------------------------------------------
>
> Key: CALCITE-2761
> URL: https://issues.apache.org/jira/browse/CALCITE-2761
> Project: Calcite
> Issue Type: Improvement
> Reporter: Stuti Gupta
> Assignee: Julian Hyde
> Priority: Major
>
> Teradata, Oracle, and Netezza have NVL function. It is not there in SQL
> standard operator table. So adding it to SqlStdOperatorTable.
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